Is there a bug with the way that ArchiMate shapes are currently rendered? Judging by the GitHub repo, the shapes varied by ArchiMate layer once but mine all seem to have rounded corners.
See this example diagram that shows the error, as well as a work-around using styles to get the correct Motivation layer shape. Could be something I'm doing wrong as I'm new to using this type of diagram in PlantUML.
If you could have a look, that would be appreciated. Thanks!